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Double surface transient equilibration method for flexible rotor

A technology of transient balance and flexible rotor, applied in static/dynamic balance test, machine/structural component test, measuring device, etc.

Inactive Publication Date: 2009-03-18
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This balancing method has made a great breakthrough in balancing efficiency under the condition that is more in line with the actual working conditions of the rotor, but it is limited to the case of single-disc rotor balancing

Method used

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  • Double surface transient equilibration method for flexible rotor
  • Double surface transient equilibration method for flexible rotor
  • Double surface transient equilibration method for flexible rotor

Examples

Experimental program
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Effect test

Embodiment Construction

[0030] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0031] This embodiment is completed on the Bently-RK4 rotor test bench, and the layout of the test bench is as follows figure 1 shown. The working speed of this rotor system is 1500rpm, and its first-order critical speed is about ω 1 =650rpm, the second-order critical speed is about ω 2 =2130rpm.

[0032] Perform two-sided balancing of a flexible rotor:

[0033] (1) Select two measurement planes near the bearings at both ends of the rotor, and select disc I and disc IV as the two balanced and weighted surfaces.

[0034] (2) According to the structural condition of the rotor, the rotor is accelerated to pass through its first two critical regions with a constant angular acceleration, and the vibration displacement signal x is collected l (t), y l (t), x r (t) and y r (t) (if image 3 shown) and the bond phase signal p(t). Among them, p(t) is a series of ...

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PUM

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Abstract

The invention relates to a dynamic balance method for flexible rotors, which can balance and damp rotary machines. The dynamic balance method is characterized in that based on the instant imbalance response in the accelerated start of a flexible rotor, in the first two critical regions, the dynamic balance method collects the instant imbalance response data adjacent to the bearings at two ends to quickly recognize the position angles of the first order and second order mode imbalances of the rotor; combines the mode state of the rotor and utilizes one-time added test start to synchronously balance the first two order modes of the rotor. The balance method can utilize imbalance acceleration instant response information to effectively and reliably balance flexible rotors, having less start times and high balance accuracy in the balance process. Compared with the prior balance method, the balance method has the advantages of high speed and efficiency.

Description

technical field [0001] The invention relates to a double-sided transient balancing method of a flexible rotor, which can be used to quickly solve the vibration problem of a rotor system of a rotating machine caused by mass imbalance. Background technique [0002] The dynamic balance of a flexible rotor, that is, to reduce the vibration of the rotor by adding or removing the balance correction amount at a certain axial and circumferential position of the rotor, is one of the important means to ensure the safe and stable operation of rotating machinery. It plays a very important role in operation and maintenance. In recent years, under the trend of rotating machinery developing towards high power, high speed, and slender shafts, the balance of flexible rotors has become more prominent and important. Improving the balance accuracy and efficiency of the rotor is always the goal pursued by this technology. [0003] At present, the rotor dynamic balance methods can be divided in...

Claims

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Application Information

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IPC IPC(8): G01M1/38
Inventor 黄金平任兴民
Owner NORTHWESTERN POLYTECHNICAL UNIV
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